Amel Hodzic ILMostro

How to mount a qcow2 disk image

This is a quick guide to mounting a qcow2 disk images on your host server. This is useful to reset passwords, edit files, or recover something without the virtual machine running.

Step 1 - Enable NBD on the Host

modprobe nbd max_part=8

How do I dropdown?

This is how you dropdown.

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Let's say you have an iOS project, and you want to use some external library, like AFNetworking. How do you integrate it?

With submodules

Add the project to your repo:

git submodule add [email protected]:AFNetworking/AFNetworking.git Vendor/AFNetworking

or something to that effect.

Setup armv7h chroot under x86_64 host (Archlinux/Archlinuxarm biased)

Simple way to setup an arm chroot for building packages for your arm devices. This is an alternative to cross-compiling where you are limited to only linking against the libs in your toolchain.

Setup chroot-fs

You can store the chroot wherever you like. I choose to store it in a disk-image which I mount to my filesystem.

Occasionally we will deploy a virtual instance into our KVM infrastructure and realize after the fact that we need more local disk space available. This is the process we use to expand the disk image. This process assumes the following:

You're using legacy disk partitions. The process for LVM is similar and I will describe that in another post.
The partition you need to resize is the last partition on the disk.

This process will work with either a qcow2 or raw disk image. For

	#!/usr/bin/env python

	"""

	Print (and write to JSON file) system information in a cross-platform manner.

	Output contains information about platform, BIOS, CPU, memory, disk, GPU, network, peripheral devices, installed
	packages, motherboard and users.

	This script heavily relies on psutil and some other bash/powershell commands. See requirements.txt for dependency list.

	#!/bin/zsh -e

	cd ~/tmpfs
	mkdir -p .lxc-root .lxc-data/etc .lxc-data/home/lilydjwg/{.vim,.cache} .lxc-work

	sudo GDK_DPI_SCALE=$GDK_DPI_SCALE zsh -e - <<'EOF'
	modprobe overlay
	mountpoint .lxc-root \|\| mount -t overlay -o lowerdir=/,upperdir=$PWD/.lxc-data,workdir=$PWD/.lxc-root overlayfs $PWD/.lxc-root

	# .lxc-root/etc/resolv.conf is protected

	#!/bin/bash

	# You must accept the Oracle Binary Code License
	# http://www.oracle.com/technetwork/java/javase/terms/license/index.html
	# usage: get_jdk.sh <ext> <jdk_version>
	# ext: rpm
	# jdk_version: default 8

	ext=rpm
	jdk_version=8

	#!/bin/bash

	el_version="6"
	kernel_major="2.6.32"
	kernel_minor="279.5.1"
	vz_major="042stab061"
	vz_minor=".2"

	echo "Fetching OpenVZ Repo..."
	cd /etc/yum.repos.d

	Get the Release.key
	https://getfedora.org/keys/obsolete.html

	rpm --import /tmp/Release.key
	or
	rpm --import https://getfedora.org/static/FB4B18E6.txt

	Enable the Fedora19 repo (NOTE: obsolete/archived)
	vi /etc/yum.repos.d/f19.repo